Actually, depending on the sizing of your foot, you could very well just get some women's boots. That's what I did and it works great, but I'm fortunate enough to have feet just barely narrow enough. For the black, I just used electric tape. It you observe them closely, that's obviously not going to produce as good a result as painting the things, but for the purposes of pictures and eye-level, it works well enough and it is removable for storage purposes or for reusing the boots in another way later if you should need them.
Actually, I've got the pair I originally used in the Marketplace right now, since they were actually a tick too big and I finally got around to buying another pair the next size down. I don't mean to make a shameless plug, but if your feet are the right size, do feel free to look the listing up. If the sizing is off but you think you can make the style work, I've got a link to the manufacturer's page on there too, so you could use it to shop around for the right size.